In a bowl, whisk together eggs, milk, salt, and pepper. Set aside.

Heat oil in a deep frying pan over medium-high heat.

Assemble each sandwich by placing a slice of tomato and mozzarella on one slice of bread, top with pepperoni, then cover with another bread slice.

Dip each sandwich into the egg mixture, ensuring it's well coated.

Carefully place the coated sandwiches into the hot oil. Fry until golden brown, about 2 to 3 minutes per side.

Remove the sandwiches with a slotted spoon and drain on paper towels.

Serve hot with your favorite dipping sauces.